Draw-bar yoke and draw-bar-yoke connection for draft-rigging.



rrnn snares CHARLES J. NASH, OF CHICAGO, ILLINOIS, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO

WILLIAM H. MINER, 0F CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented Feb. 3, 1914.

Application filed February 10, 1908. Serial No. 415,019.

To all whom it may concern:

Be it known that I, CHARL'ss J. NASH, citizen of the United States.residing in Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Draw-Bar Yokes and Draw-Bar-Yoke Connections for Draft-Rigging, of which the following is aspecification.

My invention relates to improvements in draft, rigging .for railwayears, and more particularly to improvements in the-construction of thedraw-bar and draw-bar yoke and draw-bar yoke connection. Its object isto provide an improved construction of draw-bar yoke and means forconnecting the same o the draw-bar, and which, at the 'same time willenable the new construction of draw-bar yoke to be replaced by the oldor ordinary construction of draw-bar yoke whenlnecessary for repairs.

The invention consists in a draw-bar fur nished on its upper and lowerfaces with recesses having curved or concave wedging or hook-shaped gibsor shoulders at their rear ends adapted to receive corrcspondiuglyshaped circular bosses on the inner side of the upper andlower membersof the yoke, thus giving the yoke a limited flexibility in respect tothe draw bar, while atv the same time affording a very secure and strongattachment of the yoke to the draw ba against pulling strains, combinedwith upper and lower front abutment or filler blocks fitting in therecesses on the upper and lower sides of the draw bar and overlappingthe flanges of the circular bosses on the upper and lower members ofthedraw bar yoke, and thus affording a very strong and secure attachment ofthe yoke to the draw bar againstbulfing strains. The inclined or wedgingform of the nnderface of the curved gib or shoulder on the draw bar atthe rear end of the recessth erein. in connection with thecorrespondingly shaped flange of the circular boss on the inner sides ofthe upper and lower members of the yoke, causes the yoke members to bugor clamp the draw bar and thus to increase the strength and security ofthe attachment of the yoke to the draw bar. The yoke is preferably madeof malleable iron and provided with integral. transverse webs at itsmiddle portion for engagement with the middle followers, thesetransverse webs also serving to strengthen the yoke and to prevent itsupper and lower members from buckling under heavy blows or stra1ns.Int-the accompanying drawing, forming a part of this specification,Figure l is a side elevation of a draft. rigging draw-bar and yokeembodying my invention; Fig. 2 is a plan View; and Fig. 3 is a detailperspective V1W showing one of the front abutment or tiller blocksemployed with the new or im-, proved construction of yokes. In thedrawing A represents a draw-bar, B the improved yoke. and D, D the frontabutment or filler blocks employed with the improved yoke.

The draw bar A is provided at its rear end on its upper and lower sideswith recesses A to-receive the filler blocks D, D. These recesses Ahave, preferably, straight square shoulders (a at their front ends andcircularly curved undercut or hook-shaped gibs or shoulders a at theirrear ends, the

under faces a of which clined or wedging.

The draw bar yoke "B is preferably cast and of malleable iron and hasits upper and lower members 6 and Z furnished on their inner sides atthe front ends thereofwith integral circular bosses b having curvedflanges. 5 adapted to fit the curved and undercut gibs or shoulders (1.of the draw bar A and snugly engage the same. The draw bar yoke 1-3 isalso preferably fnished with integral transverse webs 71* at its mid dleportion for engagement with the two middle followers of the tandemspring draft rigging.

the trout abutment or tiller blocks i) which may be removed or replacedtit in the recesses A of the draw bar between the front, shoulders (4thereof and the circular curved front face of the yoke bosses b and eachhas a square shoulder 1/ at the front end thereof to abut against thefront shoulder (1 of the draw bar recess A and a circularly curvedconcave rear shoulder (Z to fit against the ,correspoiuling convex yokeboss 6 The concave shoulder Z has a concave undercut or shoulder with aninclined face (Z to overlap the flange b of the circular boss?) of theyoke. The front abutment or filler blocks D D in connection with theshoulder a of the draw bar and the curved bosses Z)" of the yoke, thusafford a strong, safe and secure connection between the draw bar andyoke in resisting bnlfing are preferably in swing laterally as requiredin passing around curves.

A rivet or bolt E passing through the connecting blocks D D and draw oarsecures the connecting blocks D in place. The rivet 8: may be preferablyalso inserted centrally through the yoke bosses b and the draw bar, thedraw bar having suitable holes a a to receive said rivets or bolts. Thedraw bar is also preferably provided with a further rivet hole a for usewhen the ordinary construction of yoke is employed, as occasion mayrequire for repairs or other purposes.

I claim: 7 v

In combination: a draw bar provided with recesses on its upper and lowersides having eoncavely curved, rear shoulders, each shoulder beingprovided with a beveled undercut portion; a yoke having inwardlyProjecting circular bosses at the front ends of the up per and lowermembers, snugly fitting said concavely curved shoulders, each of thebosses belng provided with a circular flange beveled to cobperate withthe beveled. undercut portions of the draw bar shoulders; and

removable upper and lower front fillerblocks 1 I having concavelycurved, rear shoulders snugly fitting the c rved end bosses of the yoke,each or the :3 ler block shoulders be 'ing provided with beveled,undercut portions corresponding-to the beveled flanges of the bosses,the beveled, undercut ortions of the draw. bar shoulders, and t .efiller block shoulders, and the beveled boss flanges, 'cooperating underculling and pulling strains to draw the ends of the upprrand lower yokemembers inwardly, substantially as specified.

onaatss J. when.

Witnesses v H. M. MUNDAY. PEARmABRAMs.

